Erratum: Transverse momentum and centrality dependence of high-\pt\ non-photonic electron suppression in Au+Au collisions at \sqrtsNN\ = 200 GeV

Abstract

The STAR collaboration at RHIC reports measurements of the inclusive yield of non-photonic electrons, which arise dominantly from semi-leptonic decays of heavy flavor mesons, over a broad range of transverse momenta ($1.2 < \pt < 10$ \gevc) in \pp, \dAu, and \AuAu collisions at \sqrtsNN = 200 GeV. The non-photonic electron yield exhibits unexpectedly large suppression in central \AuAu collisions at high \pt, suggesting substantial heavy quark energy loss at RHIC. The centrality and \pt dependences of the suppression provide constraints on theoretical models of suppression.

Figures (4)

• Figure 1: (a) $dE/dx$ projections for $5 < \hbox{$p_T$} (\hbox{${\mathrm{GeV/}}c$}) < 7$ in central Au+Au events after EMC and SMD cuts. The lines are Gaussian fits for $p+K$, $\pi$, and electron yields. (b) Invariant $e^{+}e^{-}$ mass spectrum. (c) Ratio of inclusive and background electron yield vs. $p_T$ for p+p and Au+Au collisions. Vertical bars are statistical errors, boxes are systematic uncertainties.
• Figure 2: Non-photonic electron spectra. Vertical bars are statistical errors, boxes are systematic uncertainties. The curves are scaled pQCD predictions for p+ppQCDCalc2. Cross section on right axis applies to p+p spectrum only.
• Figure 3: Upper: ratio between measured non-photonic electron yield and FONLL pQCD calculations pQCDCalc2 for p+p collisions. Lower: relative contributions to FONLL distribution of c and b decays.
• Figure 4: The nuclear modification factor, $R_{AA}$, for d+Au and Au+Au collisions at $\sqrt{s_{_{\mathrm{NN}}}}$ = 200 GeV. Error bars and uncertainties are described in text.